Cultist Altar
From Drunkapedia
Altar that randomly spawn around the Marae Lassel Plateau and which spawn creatures when it is used by players. It usually has a spawn of 2 cultists around it. It is part of the Caliginous Bethel Quest because one of the creatures it spawns, the Dark Vapor, summons a portal to the Caliginous Bethel dungeon upon death.
Creatures that it can spawn: Synnast, Scathisa, Umbris Shadow, Summoned Pulsar Wisp, Entropy Wisp, Dual Fragment, Vapor Golem, The Black Breath, Hellfire, Lag Beast, and Dark Vapor.